Specification: Item: Blade Mini Humbucker Pickup Bobbin Base Plate Kit. (Note: Magnet wire is NOT included in this kit, and can be purchased elsewhere separately.) Bar Magnet: Magnetized, Alnico 5. Dimension: 57 x 6.5 x 5mm/2.246 x 0.255 x 0.197in Bobbin: Pre-assemble unwound black plastic bobbins. Color: chrome blade w/ black bobbin, chrome blade w/cream bobbin, chrome blade w/ white bobbin, black blade w/ black bobbin for your choose. Bobbin Demension: 67.52 x 19.26 x 7.83mm/2.652 x 0.757 x 0.306in. Bottom Flatwork: Black vulcanized fiber, with metal eyelets where to attached each end of the coil wire and solder conductor cables. Thickness=2.4mm/0.094in. Condcutor Cable: 28awg, 7-strand, tinned copper wire stranded tinned conductors(4-conductor cable). Length=1.5ft/45.72cm. Pickup Height Adjustment kit: come with 2pcs springs and 2pcs screws. Winding the coil by hand offers the opportunity of having your pickup sound just as good as, if not better than, the same coil wound by a machine, offers the pickup sound you like. Package list: 2 x pre-assembled mini humbucker pickup bobbins 1 x alnico 5 bar magnet 1 x bottom flatwork 1 x conductor cables 2 x springs 2 x screws